Sunday’s memorial to mark the 20th anniversary of Rachel Mellon’s disappearance included the release of 210 purple balloons to honor the missing in Illinois. Some attached green tag to the balloons with information about Rachel.

Sunday’s memorial to mark the 20th anniversary of Rachel Mellon’s disappearance included the release of 210 purple balloons to honor the missing in Illinois. Some attached green tag to the balloons with information about Rachel. (Alicia Fabbre / Naperville Sun)

Families of missing people gathered Sunday at Rachel Mellon's former school in Bolingbrook to mark the 20th anniversary of her disappearance and to remember the hundreds of other missing people from Illinois.